Electrohydraulic excitation controlling valve

Abstract

The invention provides an electrohydraulic excitation control valve and comprises a valve body. The valve body is provided with an oil inlet communicated with a high pressure oil tank, a first in-and-out oil port communicated with a hydraulic cylinder, a second in-and-out oil port, a first oil outlet communicated with an oil returning tank and a second oil outlet; the electrohydraulic excitation control valve also comprises a valve core and a valve sleeve; the valve sleeve is nested on the inner wall of the valve body; the valve core passes through the valve sleeve; the valve core is connected with a first servo-motor and a second servo-motor; the valve core is provided with at least four shoulders with the same interval; the shoulder is uniformly provided with at least two grooves along the circumferential direction and the grooves on the adjacent shoulders back and forth are mutually mal-positioned; the valve sleeve is uniformly provided with a circle of valve sleeve windows along the circumferential direction and the valve sleeve windows matches with each shoulder; the valve sleeve window has at least four circles and the valve sleeve between the adjacent valve sleeve windows is provided with an auxiliary window; the end of the valve sleeve which is close to the first valve sleeve window is provided with an additional window. The invention can greatly improve electrohydraulic excitation frequency greatly.

Description

technical field [0001] The invention relates to an electro-hydraulic excitation control valve. Background technique [0002] As a basic test of modern industry and an important means of product development, vibration test is widely used in many important engineering fields, such as road simulation tests of automobiles and walking machinery; seismic fatigue tests of engineering materials, dams and high-rise buildings, etc. [0003] There are mainly three types of excitation methods: mechanical, electromagnetic and electro-hydraulic. Compared with the former two, electro-hydraulic excitation has the advantages of large excitation power, large thrust, and multi-point excitation. It is mainly used in Heavy load, high power occasions. The working principle of the existing electro-hydraulic excitation (such as figure 1 Shown) is to control the hydraulic actuator ② (oil cylinder or motor) to make reciprocating linear or twisting motion by inputting the excitation signal to the el...

AI Technical Summary

Problems solved by technology

Since the frequency response of the electro-hydraulic servo valve is difficult to break through in a large range, it is difficult to further increase the operating frequency of the electro-hydraulic servo vibration table

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